Injector



Feb. 2 1926.

J. M. GONZALEZ INJECTOR Filed Oct. 14, 1924 gva/vento@ MQLM Patented Feb. 2, 19.26.

UNITED STATES PATENT OFFICE.

INJnoTon.

Application led October 14, 1924. Serial No. 743,627.

.To all w71 om t may concern.'

Be it known that I, JOAQUIN Monn'r GoN- zLnz, a citizen of Cuba, and resi-ding at Marcane termino, municipality of Palma Soriano, Oriente, Cuba, have invented cer tain new and useful Improvements in lnjectors, of which the following` isa specilication.

This invention relates to injectors, particularly to steam injectors for use on locomotives, and the objects of the invention are to provide an injector in which the interior parts are readily accessible and removable to permit cleaning or replacement of these parts without disturbing the connections to the piping; to provide a novel arrangement of starting nozzle with respect to the overflow', to locate the discharge check valve so that inspection of the same may be made without removing the injector from its con nections with the boiler, and other improvenrents in the construction of the injector.

The invention may be more fully understood by reference to the following drawings, in which- Fig. 1 is longitudinal section view of the preferred form of the injector'.

Fig. 2 is a cross-section of the easing on line 2-2 of Fig. 1.

lhe body or casing 10 of the injector is provided with a steam inlet 11, water inlet l2, overflow outlet 13, and delivery outlet 14. The inlets and outlets are screw threaded to permit attachment of piping` to the boiler', well andoverflow pipe. `Within the injector are the transverse partitions 15, 16, 17, 16 and 19 in which are threaded openings 21, 22, 23 and 24 into which are screwed the combined valve guide 25 and steam nozzle 26, lifting cone 27, con'ibining cone 28, and plug` 29, respectively. The end-wall is also provided with a threaded opening into which is screwed the bonnet 81. It is to he noted that the threaded openings referred to are in alignment and increase progressively in diameter from the discharge end of the injector towards the rear end. By providing the transverse partitions with progressively larger openings it is possible to with` draw all of the nozzles from the rear end of the injector without uncoupling the injector from the piping.

The valve spindle 32 passes through the bonnet 31 which is provided with a nut 33 and fluid tight packing 34. Pivoted to the rear end of the valve spindle 32 is an operating handle 35 to which are also pivoted the links 36 and 87. The forward end of the link 36 is pivoted to the injector casing at 38 and the link 37 is pivoted at its forward end to a starting valve spindle 39, to. which is attached a valve head 40 adapted to seat against the valve seat 41. The valve operating handle is further provided with a pawl 42 adapted to lit in the groove 43 of the guide 44.

The passage of steam through the steam nozzle 26 is cont-rolled by the valve 45 which is constructed in two cylindrical cup shaped parts, 45a and 45b one slidable within the other. The outer' part 45b is threaded on the valve spindle and is provided with `a small opening 46 in its sidewall and an opening 47 through whichV the inner part 45a slides. Each part is provided with a shoulder 48 and the Vvalve is so constructed'that the outer part 45b may be moved rearwardly some ldistance before the shoulders abut, at which time further rearward movement of the part 45b causes the inner part 45a to also move rearwardly, thus opening the passage in the steam nozzle 26. The part 45a is provided with two spaced openings 49 and 50, the former providing communication between the interior of theV part 45 and the opening` 46 in the part 45h, while the opening 50 provides for communication between the interior of the part 45'u1 and the passage 20. 1V hen the part 45a is so disposed with relation to the part 45b that the forward end wall of the part 45b is intermediate the openings 49 and 50, communication between the passages 46 and 2O is established.

Connecting the steam chamber 51 with the overflow chamber 52 is a small bore nozzle 53 and in alignment with the nozzle 53 is a passage 54 leading to the overflow out let 13. The passage of steam through the nozzle F?) is controlled by the valve 40 tached to the operating handle 35.

The overflow chamber 52 communicates with the combining chamber 55 through the opening 56, controlled by the. check valve 57 The construction of the cones 28 and 58 is to be noted, the cone 28 being screwed upon the cone 58 in such a manner ythat it is possible to withdraw itfrom the injector along with cone 28 at the rear end of the injector or it may be unscrewed from cone 28 and withdrawn from the discharge end of the injector when the injector is not coupled to the piping. This feature is of importance because the discharge cone is subject to wear and must be replaced or cleaned at frequent intervals. In case the injector has not been connected to the discharge pipe it is a comparatively simple mattei' to remove they cone 58 from the discharge end of the injector, the plug 29 being rst removed. IVhen, however, the injector has been coupled to piping' and it becomes necessary to remove cone 58 it is possible to remove it through the rear end-wall 30. 1

The discharge check valve 60 is seated within a guide member 61 screwed into the opening 62 in the casing 10. A threaded cap G3 screwed into an opening 64, which 1s larger than the opening 62, closes both openings 62 and 64. The valve guide 6l 1s provided with openings 65 to permit passage of water into the. discharge pipe 66. The location of the check valve 60 is such that it may be inspected or replaced simply by removing the cap 68 and without disturbing any of the connections to the injector.

Having described the construction of the injector the operation will'be readily understood from the following description of the various steps taken in starting and operating the injector. In the position shown in Fig. 1 the valve members 452L and 45b are each in their furthest forward positions, the steam nozzle passage is closed and the starting valve is fully open. The opening 46 in valve member b is closed and no steam can pass from the steam inlet 11 into the injector. T prime the. injector thc valve handle 35 is moved rearwardly until the pawl 42 engages the groove 43. then this position is reached the opening 46 is uncovered, permitting steam to fiow from the inlet 11 through openings 49 and 50, passages'20 and 51, starting nozzle 53, into the overflow passage 54. The passage 54 acts as an ejector to draw air from the overflow chamber 52. The vacuum thus created will lift the. check valve 57 and reduce the pressure within the combining chamber 55. IVater from the inletl2 will now flow through the lifting cone 27 into the chamber yrlhe overflow will pass through the opening 5G into the' overflow outlet 13. he valve handle 35 is then drawn back quickly to open the passage in steam nozzle 26, and at the same time the valve 40 closes the passage in nozzle 53. As the 4steam flow in nozzle 26 is increased the pressure in chamber is reduced which causes the overflow valve 57 to close. Vith thel operating handle drawn rearwardly as far as possible the flow of steam and water into the injector is continuous, the check valve is open and water is forced into the boiler through the delivery outlet 14.

Having thus described my invention what I claim as new and desire to secure by U. S. Letters Patent is:

1. In an injector, the combination of a steam inlet, a water inlet, a steam chamber, a plurality of water chambers, an overflow chamber, a starting nozzle providing communication between the steam chamber and the overflow chamber, a steam nozzle providing communication between the steam chamber and the water chambers, and valve operating means adapted when in one position to shut off the supply of steam to the steam chamber, to open the steam nozzle and close the starting nozzle when in another position, and to establish communication between the steam inlet, steam chambers and overflow chamber when in a position intermediate said other two positions the pressure in said overflow chamber being less than atmospheric pressure when said valve operating means is in its intermediate position.

2. In an injector, the combination of a steam inlet, a. water inlet, a steam chamber, a plurality of water chambers, an overflow chamber, ay starting nozzle providing communication between the steam chamber and the overflow chamber, a steam nozzle providing communication between the steam chamber and the water chambers, and valve operating means adapted when in one position to shut off the supply of steam to the steam chamber, to open the steam nozzle and close the starting nozzle when in another position, and to establish communication between the steam inlet, steam chamber and overflow chamber when in a position intermediate said other two positions, the pressure in said overflow chamber being less than atmospheric pressure when said valve operating means is in its intermediate position, said valve operating means comprising two members, one of which is slidable within t-he other.

3. In an injector, a transverse wall into which is secured a combining cone, a discharge cone secured in said combining cone, and openings in each end of the injector, whereby the discharge cone may be withdrawn from either end of the injector.

4. In an injector, the combination of a casing having transversey walls provided with aligned openings, said openings being progressively larger in diameter from one entr of the injector toward the other end, cones secured in each of said openings, an

opening in each end of the injector', and a discharge cone secured in one of said cones but separable therefrom, whereby said discharge cone may be Withdrawn from either end of the injector.

5. In an injector, a casing, a discharge outlet for Said casing, a check valve for said discharge outlet, a clip-shaped guide for said check Valve secured Within the side Wall of said casing, a valve seat in the bottom Wall 10 of said guide, and openings in the Walls of said guide to provide communication between the interior of the injector and the discharge outlet.

In testimony whereof I hereunto affix my I5 signature.

JOAQUIN MORET GONZLEZ. 

